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A213920 as a simple table

na(n)
00
11
21
32
43
57
615
734
879
9190
10457
111132
122823
137126
1418136
1546541
16120103
17312109
18815012
192137755
205632399
2114895684
2239519502
23105198371
24280815067
25751490363
262016142768
275420945437
2814604580683
2939425557103
30106618273626
31288792927325
32783516425820

[0,1,1,2,3,7,15,34,79,190,457,1132,2823,7126,
 18136,46541,120103,312109,815012,2137755,5632399,
 14895684,39519502,105198371,280815067,751490363,
 2016142768,5420945437,14604580683,39425557103,
 106618273626,288792927325,783516425820]